Machine for manufacturing envelops, paper bags, or the like.



No. 746.917. PATEN'TED DEC. 15, 1903. Q

G. R. BERGMANN MACHINE FOR MANUFACTURING ENV ELOPS, PAPER BAGS OR THE LIKE.

APPLIOATION FILED SEPT. 22, 19Q2. no MODEL. a SHEETS-SHEET 1.

PETE -s ro. moto-uwo. wAsnmm oN. n. c.

No. 746,917. I PATENTED DEC. 15, 1903., 0. R. BERGMANN. MACHINE FOR MANUFACTURING ENVBLOPS, PAPER BAGS, OR THE LIKE.

APPLIGATION FILED SEPT. 22, 1902.

3 SHEETS-$HEET 2.

K0 MODEL.

Evans co. Puma-1 Na. 746,917. PATENTED DEC. 15. 1903.

0. R. BERGMANN.

MACHINE FOR MANUFACTURING ENVELOPS, PAPER BAGS, OR THE LIKE. APPLIUATION mum P122, 1902.

.NO MODEL. v 3 SHEE1'55-7811EI1'IL3.-

UNITED STATES Patented December 15, 1903.

CARL RUDOLF BERGMANN, OF BERLIN, GERMANY..

MACHINE FOR MANUFACTURING ENVELOPS, PAPER BAGS, OR THE LIKE.

SPECIFICATION forming part of Letters Patent No. 746,917, dated December 15, 1903.

Application filed September 22, 1902. Serial No- 124,427. (No model.)

change either the whole folding apparatus or to make the folding-plates divided and interchangeable with each other. In the first case the cost of an envelop-machine is "ery high, as the folding apparatus represents the most expensive part of the machine, and in the other case, where the folding-plates are divided and both parts interchangeable, the envelops or paper bags remain unpressed at the point between the two folding-plate parts, so that all the envelops or paper bags have to be again specially pressed.

The object of the present invention is to remove the disadvantages existing in the known contrivances. This is accomplished by making each folding-plate in two parts-that is, by a hinge or joint which serves atthe the same time as a support and a special plate connected with said hinge or joint, said plate being undivided in the direction of the edge of the envelop or paper bag. The separate plates can therefore be disconnected, the folding apparatus adjusted in a suitable manner,

and smaller or. larger plates fixed if the size.

or shape of the envelops or paper bags has to be varied. This improvement can,however, also be applied with advantage to machines when the folding-plates were npto the present made divided in the direction of the edge of the envelop.

The drawings represent the upper part of such a machine, Figure 1 being a longitudinal section on line AB of Fig.2; ig. 2, a plan view. Fig. 3 is a plan view of-t-he machine, provided, however, with smaller plates. Fig. 4 shows the application of the present improvement to machines having the folding-plates divided in the direction of the envelop edge. Figs. 5 to '7 are detail views. Fig.

.8 represents the arrangement of plates for the envelop shown, for example, in Fig. 9.

The machine-frame 10. is provided at its upper part with an opening 11, over which the folding apparatus is placed. The latter is arranged on four blocks 12, 13, 14, and 15, of which 12 is fixed firmly on the frame-plate 17, while the other three are movable. All

the blocks can be moved to or from each other by means of suitable guide-rails 16, Fig. 5. On each of these blocks is a hinge 18,'which is connected with the adjacent block by means of a guiding-slot 20. Each hinge-joint carries one of the four angleplates 19, extending upward and adjustable with the blocks, also having connection with oneanother by guiding-slots 21, and is shown, for example, in Fig. 6 serving as a guide to the envelop-sheet passing to the folding apparatus. Each hinge is detachablyconnectedwith a plate 22, corresponding in size and shape to the flaps of the envelop, paper bag, and the like to be made. These plates 22 have, however, to be arranged in such a manner that they have contact at all points with the interchangeable base-plate 24, arranged on an oscillating foundation 23. The oscillating movementgiven to the plates 22, with the corresponding hinge, takes place in the ordinary way by means of connecting-rods 25, cranks 26, and suitable lever mechanism 27 28 29 30 by cams and step-pulleys 31 32 33 34, the cam 31 acting on angle-lever 27, cam 32 on lever 28, cam 33 on lever 29, and, finally, cam 34 on driving-rod 30. The oscillating plate 23 is actuated by a cam 36 by means of an oscillating-double lever 35. All the cams can be placed on a common shaft 37.

.The'operation is as follows: If the cams 31 to 34 are caused to assume such a position that all the plates 22 are vertical, as indicated in dotted lines in Fig. 7, and the plate 23 is A On the stamp 38 returning, the folding-plates come into operation and bend each flap of the envelop or paper bag over and fold them to a sharp edge. The rising-and-falling movement of stamp 38 can be effected by a cam 39 and convenient lever connections 40 41 and rods 42. When the envelop or paper bag is folded, the fold: ingplates move again to a vertical position, and at the same timea downward movement of plate 23 into the position shown in dotted lines in Fig. 1 takes place, so that the envelop can slideinto the box or drawer 43 below. If, for example, smaller envelops or paper bags are to be made with the same machine, the connection between hinges 18 and the plates 22 is unfastened. The latter are removed, the slot-guides 20 21 and the cranks 26 concerneddisconnected and,finally, the connections 44 45 of angle-lever 27 and rod 30. After this operation the blocks 13, 14, and 15, with the parts connected thereto, are moved both toward one another and toward the block 12 and the connections remade. The shortening of rod 30 on one hand and the adjustment of joint 46, connected with angle-lever 27, is necessary, as otherwise the movement of the folding-plates belonging theretowould be altered. When displacing the folding apparatus and interchanging plates 22, base-plates24 must of course also be interchanged, as otherwise a displacement of the blocks and the whole apparatus would not be possible.

Fig. 7 shows in solid lines the folding-plate in folded-down position,while the dotted lines show it raised.

If envelops, for example, as shown in Fig.

9, are to be made, it is necessary that the folding-plates should not be folded down together, but one after the other, according to the position of the envelop-flaps a b c d-that is to say, plate folding the fiapa must be moved down first and the plates folding the envelop b d last.

As shown in Fig. 4, each hinge consists of two parts 18 18. One part of eachis fixed to blocks 12, 13, 14, or 15, and boththese parts are connected to one of the interchangeable plates 22.

For sake of clearness ofillustration the upper angle-plates 19 are omitted in Figs. 2 to 4 and 8.

It is immaterial in what manner separate details are constructed, and the driving mechanism used is of secondary importance. The interchangeable plates 22 may also be of any convenient shape, as will be seen in Figs. 2 to 4. The shape of the folding-plates is always also guided by the shape of the envelop, paper bag, and the like to be made. For example, one or more folding-plates can be made perforated. or as is the case with one of the plates in Fig. 8, provided with bars 48 for effecting the folding over of the envelopflaps.

Having thus described my invention, the following is what I claim as new therein and desire to secure by Letters Patent:

1. In a machine for manufacturing envelops of different sizes, means for folding the envelop comprising a plurality of hinges ad justable toward and'from each other, and a plurality of interchangeable folding-plates corresponding to the shape of the envelopflaps, secured to said hinges.

2. In a machine for manufacturing envelops of different sizes, means for folding the envelop comprising a plurality of hinges adjustable toward and from each other, a plurality of interchangeable folding-plates corresponding to the shape of the envelop-flaps, secured to said hinges, and an interchange able bed-plate corresponding to the shape of the envelop to be made.

In witness whereof I have hereunto set my hand in presence of two witnesses.

CARL RUDOLF BERGMANN.

Witnesses:

WOLDEMAR HAUPT, HENRY HASPER. 

